I'm trying to use the right terminology - watch me fail... I have a wooden door & frame which required a replacement of its (standard, Yale) night latch. This also meant replacing the keep. Now, the previous keep was held in place with two pretty small screws. With the new keep, I did the alleged right thing and tried to use the four much sturdier screws - only to find the door jamb starting to curve inwards. As far as I can see, the lock-side jamb / frame is too shallow and I might be hitting the wall, and I would either have to use shorter screws, or pre-drill through it, into the wall, and fit the keep with possibly even longer screws with wall plugs pushed all the way through, into the wall. I now also have to sand down the parts of the jamb/frame that are now rubbing against the door, unless the trick of fitting the keep with long screws and wall plugs compresses it back into place (we're only talking about 1-1.5mm deflection). Does this sound right? Would anyone (with far more experience) suggest anything else? Thank you!